Gason 235848 Programming manual

COPYRIGHT
Neither this manual or part thereof may be reproduced or published
without the prior permission of AF Gason Pty Ltd
Operators & Parts
Manual
GPN 235883 REV* 07/01/2021

OH&S Compliance Certification
Company Name A.F. GASON PTY LTD
A hazard identification, risk assessment and risk control procedure has been carried out on a representative example of the under men-
tioned product(s) in accordance with the Occupational Health and Safety requirements of all states and territories of Australia and where
found necessary the appropriate risk control measures have been incorporated in the product specifications.
The operator’s manual contains the necessary health and safety information and safety warnings are applied to the product where neces-
sary.
Product Description PARALLELOGRAM PRESSWHEEL
Models No. or No.’s 235848
Signed on behalf of the above named company
Name (printed) Tom Mccluskey
Position Design Engineer
Date --/--/2021
Details of the Unit Assessed for the Purpose of Compliance
Model No. PARALLELOGRAM PRESSWHEEL
Serial No. 235848-000100
Date of Inspection --/--/2021
Location of Inspection ARARAT, VICTORIA

Contents
Safety ......................................................................................................................................................2
Installation ..............................................................................................................................................3
Torque Specifications..............................................................................................................................3
Set-up......................................................................................................................................................4
Operation................................................................................................................................................4
Maintenance...........................................................................................................................................4
10 hours (Daily)...................................................................................................................................4
100 hours (Weekly).............................................................................................................................4
Bush Replacement..............................................................................................................................5
Tyre/Bearing Replacement.................................................................................................................5
Spare Parts..............................................................................................................................................6
Base Parts Assembly –GPN 235677....................................................................................................7
Shank Options .....................................................................................................................................8
Presswheel Assembly –GPN 235804 ..................................................................................................9
Optional Mud-Scraper –GPN 235809...............................................................................................10

Introduction
1
AF Gason Pty Ltd (Gason) is an Australian
owned family business operating from within
rural Victoria. The Gason Company has been
servicing the needs of rural Australians for
over 75 years. We operate through a local
dealer support network that spans the coun-
try. Gason would like to thank you for pur-
chasing your Australian made tillage attach-
ment, and trust that you will have many years
of trouble free service.
The Gason Parallelogram Presswheels are a till-
age implement attachment that offers inframe
mounting of presswheels to individual tines for
improved seed placement, seed/fertilizer sep-
aration and seed to soil contact.
Some features of the Gason Parallelogram
Presswheel include:
▪Mounts direct to Gason HydraTILL tine.
▪Height setting variable for large range of
under frame clearances.
▪All pivot points use greaseable hardened
bushes.
▪Aluminium split rim that allows fitment
of different tyres, varying in tyre width,
profile and construction.
▪Adjustable tyre down-force.
▪Optional adjustable mud scraper.
▪Adjustable Sowing Boot.
Field experience has shown that a good under-
standing of the implement and its attachments
greatly reduces problems in the field.
Prior to use, please ensure the manual has
been read and understood.
This presswheel may not be suitable for all soil
conditions throughout Australia. When pur-
chasing these attachments please conduct suf-
ficient research to ensure correct operation in
your local conditions. Presswheels of any de-
scription will have an adverse effect on trash
flow. Stubble management at harvest is im-
portant for successful operation of press-
wheels at seeding.
Only the primary shank of the Parallelogram
Presswheel is to be used for engaging un-
worked ground. The Parallelogram Presswheel
sowing boot has been designed to be a sec-
ondary seeding device, it should be adjusted
high enough that it only engages loose soil. If
not, premature wear or failure could occur.
The Parallelogram Presswheel should not be
worked in rocky ground.
Important: Warranty will be void if working in
rocky ground.

Safety
2
Safety
Gason rate operator Safety as one of the high-
est priorities when designing new features and
machines. Every effort is taken to consider the
end user and the safety risks they may face.
Accidents can disable & kill
Accidents are costly
Accidents can be avoided
General Safety
Whilst great care and every effort have been
made by Gason to provide a machine to the
highest possible safety standards, tillage ma-
chinery by nature is potentially dangerous.
Read and understand this manual and the man-
ual of the tractor. Know your machine and its
limits and operate within them. If in doubt, ASK!
Be Prepared
In the event of an emergency it is best to be
prepared. Gason recommend whilst operating
machinery, a fire extinguisher and first aid kit
should be readily available in the event that
they might be required.
Safety Rules
Danger: Stand well clear when the at-
tached machine is in operation, including folding
or unfolding wings.
Danger: Do not work under an unsup-
ported implement.
Danger: Do not work on or make adjust-
ments to the presswheels unless the tractor is
turned off, handbrake applied and key removed.
Caution: Check that all hardware is tight
and properly installed. Refer Assembly Torque
table.
Caution: Where possible, it is good prac-
tice to always keep a mobile phone on your per-
son whilst working alone.
Caution: Be aware of protruding sharp
ground engaging tools whilst in the vicinity of
the machinery.
Disclaimer
Gason accepts no responsibility or liability for any losses, injuries or damages
that may result from failing to observe these safety rules.

Installation
3
Installation
The Parallelogram Presswheel has been de-
signed to fit into a Gason HydraTILL tine.
First, fully raise the implement. The assembly
is installed by pinning though the shank and
cast pivot bracket then tightening and lock-
ing the two M20 set screws. From factory the
pin will be installed in the middle hole in both
the pivot bracket and the shank and the set
screws will be locked loose (for ease of ad-
justment). The mid position will give approx-
imately 750mm under-frame clearance
(UFC), depending on the point used. The UFC
can be adjusted in 12.5mm (1/2”) incre-
ments.
HydraTILL tine with Parallelogram
Presswheel installed in middle position.
Care should be taken to ensure each
Parallelogram is set in the same holes
(same UFC).
Ensure the two M20 set screws are
tightened hard against the shank and
locked with the nut prior to use.
Torque Specifications
Caution: Torque values listed on the
following page should be used as a guide
only. If a different torque value or tighten-
ing procedure is specified for a specific ap-
plication, do not use these values.
Refer to the Parts section for proper grade
and length of bolts for replacement parts.
Do not replace Nyloc nuts with nuts and
spring washers. Replace all parts with origi-
nal specified parts only (note fastener
grades).
The following torque figures are those rec-
ommended for zinc plated, lightly oiled
bolts. Recommended assembly torques may
be obtained by multiplying the torque fig-
ures in the table below by:
0.78 –for degreased zinc plated bolts.
1.10 –for black oxide finished bolts
lbf.ft Nm lbf.ft Nm lbf.ft Nm
7/16 UNF 43 59 60 82 - -
7/16 UNC 39 53 54 74 - -
1/2 UNF 67 91 94 128 - -
1/2 UNC 59 81 83 113 - -
5/8 UNF 135 184 186 253 - -
5/8 UNC 117 159 165 224 - -
3/4 UNF 235 319 325 441 - -
3/4 UNC 210 285 290 394 - -
7/8 UNF 370 502 520 706 - -
7/8 UNC 335 455 470 638 - -
1UNF 550 746 775 1052 - -
1UNC 505 685 710 963 - -
M10 1.5 29 40 41 56 - -
M12 1.75 51 70 73 100 - -
M16 - - - - - 170 231
M16 2.0 126 171 180 245 - -
M18 1.5 - - - - 254 345
M20 1.5 - - - - 376 510
M20 2.5 247 335 351 477 - -
M22 1.5 - - - - 475 645
M24 - - - - - 500 679
M24 3.0 425 577 608 825 - -
Head Markings
(Manufacturers marks
mayvary)
Recommended Assembly Torque
8.8
10.9
Wheel Stud
Metric Grade Number
S.A.E Grade Number
5
8
Size
Thread
Pitch
Wheel Stud
Head Markings
(Manufacturers marks
mayvary)

Operation
4
Set-up
1. Before making any adjustments to the Par-
allelogram Presswheels read and under-
stand the operating instructions for your
implement.
2. Set the desired packing force on the
presswheel tyre by changing the positions
of the extension spring retainers. Moving
the spring retainer rearwards increases
packing force.
3. Initially set the sowing boot depth to posi-
tion “F”. If noted from previous use set
the sowing boot depth to the correct posi-
tion.
4. If installed, the mudscraper should have
approximately 3mm clearance on the
tyre.
5. Set the implement depth stops to achieve
desired digging depth (and fertiliser
depth).
6. Sow at least 50 metres with the implement
and the Parallelogram Presswheels at the
desired sowing speed with product flowing
at desired rates.
7. Stop the machine. Check sowing depth and
adjust sowing boot as necessary. Sowing
boot adjusts in 5mm increments. Repeat
steps 6 and 7 until desired sowing depth is
consistently achieved.
Note: For best results, the sowing boot needs
to be adjusted on commencement of each job
when the machine is at working depth in the
soil to obtain optimum seed placement. Check
and re-check during operation.
Caution: there is a limitation to maxi-
mum depth obtained with the sowing boot.
Depth will varywith soil type, moisture content
of soil, speed of travel and type of digging
point. Never adjust sowing boot depth below
the primary digging tool!
Operation
When working with your frame mounted
presswheels, follow all operating guidelines in
the Implement manual and regularly check for:
▪Blockages due to mud, stubble, etc.
▪Wheels can freely rotate.
▪Even tyre wear and/or damage.
▪All hardware in place and tight.
▪Kinks/blockages in sowing tubes
▪Point, boot & mud scraper wear
Be safety conscious during every operation
with your machine. Ensure bystanders are not
too close or riding on the implement when
working, raising or lowering machine.
Maintenance
10 hours (Daily)
Check for uneven tyre wear or damage, ensure
there is no material build-up on presswheels,
arms, sowing boots or mud-scrapers.
Check for kinks or blockages in sowing tubes,
manually run product through the distribution
system whilst stationary and ensure product is
being dispensed from each sowing boot.
100 hours (Weekly)
Grease the four hardened steel pivots. In ex-
treme dusty conditions pivots should be
greased at 50 hours or twice weekly. Use any
lithium based, extreme pressure general pur-
pose grease containing approximately 10%
weight of molybdenum disulphide.
Check wheels can freely rotate, observe wear
on point, sowing boot & mud scraper and re-
place as necessary. Check all hardware is in
place and tight.

Operation
5
Bush Replacement
For pivots using hardened steel pins and
bushes, follow the procedure below:
Removal and installation of the bush must be
done as follows:
1. Remove worn bush from its housing.
2. Check for damage, clean and degrease
the housing internal diameter and the new
bush external diameter with a contact cleaner
or Loctite 770.
3. Allow to dry.
4. Apply a light coating of Loctite 620 or similar
retaining compound to the leading chamfered
edge of the replacement bush external diame-
ter only.
5. Press fit into housing until flush.
Important: Take extreme care not to damage
or remove the inner surface of the bush. En-
sure no adhesive contacts the bush’s inner
surface.
Tyre/Bearing Replacement
The Manutec presswheel fitted to the Paral-
lelogram consists of a split aluminium rim, a
rubber tyre, two sealed deep groove ball
bearings, steel seals, bushings and fasteners.
A long service life, without the need for relu-
brication, adjustment or any other mainte-
nance can be expected. In the event that a
failure occurs, follow the following instruc-
tions for replacement of the bearings or press-
wheel tyre.
Disassembly instructions
1. Remove wheel/tyre assembly from the
Parallelogram by removing the M16 axle
bolt.
2. Remove the M10 fasteners holding the
two halves of the aluminium rim together.
3. Disassemble the two rim halves and the
tyre.
4. Sitting the rim halves on two blocks of
wood, inside facing upwards, use a punch
on the bearings outer race to remove the
bearings, seals and bushings if required.
5. Inspect all components and replace as nec-
essary.
Assembly instructions
1. Placing the rim halves inside down on a flat
surface, use a suitable tool to press/punch
in the bearing by its outer race.
2. Fit flat washer and steel bush.
3. Use a suitable tool to press/punch in the
metal seal.
4. With the presswheel tyre between the two
rim halves, torque M10 fasteners to
60N.m.
5. Replace assembly and secure M16 axle
bolt tightening only enough to prevent ro-
tation.

6
Spare Parts
Parallelogram Presswheel

Spare Parts
7
Base Parts Assembly –GPN 235677
ITEM
PART No.
DESCRIPTION
QTY
1
209191
CLIP GRIP 3MM
1
2
REF.
SHANK ASSEMBLY AS CONFIGURED
1
3
214877
SPRING EXTENSION
2
4
235671
LINKAGE PLATE UPPER
2
5
235672
LINKAGE PLATE LOWER
2
6
235673
SPRING RETAINER
2
7
235674
PARALELLOGRAM WELDMENT
1
8
235675
PIN
1
9
236570
SOWING TUBE PARALLELOGRAM
1
10
235804
PRESSWHEEL ASSY
1
11
235809
MUDSCRAPER KIT
1
12
900824
PIVOT BUSH
4
13
903406
NUT NYLOC M10 CL8 AS1285
1
14
903930
NUT NYLOC M16 CL8
5
15
913421
BOLT M10x75x1.5P GR8.8 HEX Z/P
1
16
913670
BOLT M16x130 GR8.8 HEX ZP
5
17
235853
DECAL –SOWING TUBE
1

Spare Parts
8
Shank Options
ITEM
PART No.
DESCRIPTION
QTY
1
209644
CLAMP
1
2
214750
SHANK ASSEMBLY - KEECH FEMALE
1
3
214913
SHANK ASSEMBLY - DOUBLE BOLT
1
4
214914
SOWING BOOT ASSEMBLY
1
5
237124
POINT HMA 1051XP
1
6
903205
NUT M5 WHIZ LOCK FLANGE - CL10
1
7
903302
NUT NYLOC M8
1
8
917311
SCREW SET M8 x 40 x 1.25P
1
9
922329
SCREW CAP M5 x 15
1
10
206036
PIVOT BUSH FOR REF. INCLUDED IN SHANK ASSEMBLIES
REF.
ASSEMBLY NOTE: APPLY THREAD
LOCKING ADHESIVE TO ITEM ⑨.

Spare Parts
9
Presswheel Assembly –GPN 235804
ITEM
PART No.
DESCRIPTION
QTY
1
201256
6205-2RS DEEP GROVE BALL BEARING
2
2
207181
TYRE PRESSWHEEL –55 WEDGE SOLID
1
207183
TYRE PRESSWHEEL –80 WEDGE SOLID
210381
TYRE PRESSWHEEL –55 WEDGE SP
210384
TYRE PRESSWHEEL –80 WEDGE SP
3
235803
PRESSWHEEL RIM (PAIR)
1
4
235805
METAL SEAL 25 X 52
2
5
235806
WASHER 34 X 51.8 X 2.8
2
6
235807
STEEL BUSH SHORT
1
7
235808
STEEL BUSH LONG
1
8
902205
NUT LOCK M12 x 1.75P HEX ZP
3
9
917601
SCREW SET M12 x 25
3
ASSEMBLY INSTRUCTIONS ON PAGE 5.

Spare Parts
10
Optional Mud-Scraper –GPN 235809
ITEM
PART No.
DESCRIPTION
QTY
1
237745
MUDSCRAPER - PAINTED
1
2
917335
SCREW SET M8 x 20 FLANGED SERRATED
2
ASSEMBLY NOTE: APPLY THREAD
LOCKING ADHESIVE TO ITEM ②.